Ib bio Study guides, Class notes & Summaries

IB Biology: Chapter 1 Latest 2024 Graded A+ cell theory - all living things are composed of cells - the cell is the smallest unit of life - cells only arise from pre-existing cells challenges to the cell theory - *striated muscle* challenges the idea that a cell has one nucleus - *giant algae* challenges the idea that cells must be simple in structure & small in size - *aseptate fungal hyphae* challenges the idea that a cell is a single unit functions of life - metabolism - r...

IB Biology Paper 2 Section B Questions and Answers Already Passed Draw a labelled diagram of the human adult male reproductive system. [5 marks] a. scrotum - shown around testes; b. testes/testis/testicles - shown inside scrotum; c. epididymis - shown adjacent to testis and connected to sperm duct; d. sperm duct/vas deferens - double line connecting testis/epididymis to urethra; e. seminal vesicle - sac shown branched off sperm duct (not off the urethra); f. prostate gland - shown positi...

IB Biology Unit 1 Latest Update Graded A+ Cell theory 3 main principles All organisms are composed of one or more cells cells are the smallest units of life all cells come from pre-existing cells 7 functions of life (MR H GREN) metabolism reproduction homeostasis growth excretion response nutrition Paramecium unicellular membrane of the kingdom known as Protista. Look at powerpoint on isa247 to see how this organism displays the functions of life. chlorella single-cell...

IB Biology Topic 1: Cell Biology Questions and Answers Already Passed What does cell theory state? That cells are the smallest possible unit of life and that living organisms are made up of cells. What are unicellular organisms? Give two examples Unicellular organisms are organisms with only one cell, such as Paramecium and Chlamydomonas. In unicellular organisms the one cell carries out all of the functions of life. Why are large organisms multicellular? Because of surface area to ...

IB Biology - Scientists of IB Bio 100% Correct Robert Hooke First person to observe cells and write the cell theory Ernst Ruska Developed the electron microscope in 1930s and won the Nobel Prize for it Friedrich Wohler Urea synthesis which falsified the theory of vitalism Davson-Danielli Proposed the 'protein sandwich' model for membrane structure Louis Pasteur Experiment with broth that confirmed that spontaneous generation of cells and organisms does not occur on Earth ...

All IB Biology Processes Latest Update with Verified Solutions Stem Cell Therapy 1. triggering the differentiation of stem cells into desired cell type 2. surgical implantation of differentiated cells into patients tissue 3. suppression of immune system so they do not get destroyed 4. monitoring so they are not cancerous eg. Stagardt's Disease (old retina cells --> new retina cells) Leukemia (bone marrow transplant) Somatic cell nuclear transfer - creation of embryonic clones...

IB BIOLOGY - HUMAN PHYSIOLOGY QUESTIONS AND ANSWERS ALREADY PASSED What is injestion? Ingestion is eating food What is Digestion? Passage of smaller molecules from the digestive What is Absorption? Passage of smaller molecules from the digestive system into the bloodstream or lymphatic system What is transport? The delivery of small molecules to tissues by the circulatory system What is the alimentary canal? The alimentary canal consists of organs through which food actually...

What are the characteristics common to all forms of life? - correct answer reproduction, carbon, responds to surroundings, Growth and Development, cellular organization, and energy What are the levels of biological organization from simple to most complex? - correct answer Molecules, cell, tissue, organ, organism, population, community, ecosystem, biosphere What are the 4 most common types of biological molecules? - correct answer Proteins, nucleic acids, carbohydrates, and lipids ...

How do you calculate the magnification of a drawing/image? - correct answer Magnification=Image size(with ruler) / Actual size(according to scale bar) How do you calculate the actual size of a magnified specimen? - correct answer Actual size=Image size(with ruler) / magnification By which process do potassium ions move through potassium channels in axons? - correct answer Facilitated diffusion -at rest, the Na-K+ pump expels Na+ ions out of cell, while K+ are put within -when the n...

IB Biology HL Exam Review Latest Version Already Graded A Outline the cell theory. Living organisms are composed of cells. Cells are the smallest unit of life. Cells come from pre-existing cells. Discuss the evidence for the cell theory. The nature of scientific theories could be introduced here: the accumulation of evidence that allows a hypothesis to become a theory; whether a theory should be abandoned when there is evidence that it does not offer a full explanation; and what evid...